Hi and welcome to the site
take it slowly xx
It seems to be a combination of everything you example and is very much deep breath, open onto a page ..
If your working knowledge is highly competent you'll possibly only need the book as a guide, reinforcing what you already know. In reverse if you are new to roles & responsibilities the book could guide & inform your practice which in turn enables you to write about experience, experiences and understanding.
Please feel free to use the search page to look for unit numbers, knowledge & performance criteria keywords that members have made posts & threads on -
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Which unit are you currently looking at?
xx